<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.bigbox{
				width:50px;
				height:50px;
				background: red;
				position: relative;
			}
			.smallbox{
				width:100px;
				height:50px;
				background: gray;
				display:display;
				position: absolute;
				top:50px;
				display:none;
			}
			.bigbox:hover .smallbox{
				display:block;
			}
		</style>
	</head>
	<body>
		<div class="bigbox">
			<div class="smallbox"></div>
		</div>
	</body>
</html>
